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July 1992, Volume 42, Issue 7

Original Article

INCOMPLETE TESTICULAR FEMINIZATION SYNDROME

Muhammad Saleem  ( Department of Paediatric Surgery, King Edward Medical College and Mayo Hospital, Lahore. )
Sajid Hameed  ( Department of Paediatric Surgery, King Edward Medical College and Mayo Hospital, Lahore. )
Mahmood Shaukat  ( Department of Paediatric Surgery, King Edward Medical College and Mayo Hospital, Lahore. )
Abdul Hamid  ( Department of Paediatric Surgery, King Edward Medical College and Mayo Hospital, Lahore. )

Incomplete testicular feminization syndrome is an important cause of male pseudohermaphroditism. Such patients either present with labial swellings in early childhood or with primary amenorrhea at puberty. End organ insensitivity to testosterone is the, basic causative factor.

CASE REPORT

A three and half year old girl presented to us with bilateral symmetrical swellings in the upper part of each labium majus. These were noted by her mother at birth. There was no history of any case of abnormal genitalia or inguinal hernia in her maternal aunts. Neither was there any record of intake of drugs like alcohol, hydantoins or cimetidine by the mother during pregnan­On physical examination the girl was of normal height and weight according to her age. Abdominal examination was normal. Examination of the genitalia revealed a normal clitoris and labium minora except for two symmetrically placed, mobile, nontender and ir­reducible swellings 2x2 cm in the upper part of each labium majus. The depth of normally placed vagina was 2.5 cm. A separate urethral opening was present. Rectal examination was done and uterus was not palpable. The age-adjusted testosterone level was raised as compared to that for a normal girl, i.e., 20 ng/dl (normal prepubertal: 1-11 ng/dl). The barr body test was negative and the karyo-type was XY. Ultrasonography failed to outline the uterus, cer­vix, fallopian tubes or ovaries. Intravenous urography showed normal appearance of the kidneys, ureters and bladder. The . swellings were explored surgically and on gross examination they appeared to be testes: They had epididymes and vas deferens. Wedge biopsies were taken from both sides. Histopathology confirmed the presence of testicular tissue. It consisted of variable sized juvenile seminiferous tubules lined by measurable number of sertoli cells which showed no functional activity. The intervening stroma was thick and fibrous and contained scattered leydig cells. Considering all these facts a diagnosis of incom­plete testicular feminization syndrome was made and bilateral orchidectomy was performed at a later date.

DISCUSSION

The incomplete testicular feminization syndrome is inherited in X linked rescessive fashion. The basic pathology is that there is a lesser degree or insensitivity to androgens in these patients compared to those with the complete syndrome. There is decreased binding of androgens to end organ cells and decreased nuclear uptake of dihydrotestosterone-cytsol receptor com­plexes. The fibroblast androgen receptor studies often show subtle qualitative abnormalities in the receptors in these patients1. With clear cut clinical features, a confi­dent clinical suspicion can be made on the very first visit of the patient. The important investigation is karyotyping which will show 46 XY. The Barr body test will be chromatin negative. The histopathology of patient’s gonads is the same in both variants of testicular feminiza­tion syndrome. It resembles the histology of undes­cended testes. Patients of testicular feminization syndrome should be reared as females because the phallus is inadequate for male gender role2. After puberty the gonads have a higher risk of developing malignancy. The incidence of malignancy in these gonads is 2.6% before the age of 15 years and about 33% by the age of 50 years3. Therefore bilateral orchidectomy is mandatory. The patients of incomplete testicular feminization syndrome must be diagnosed early and treated before the age of puberty to avoid the risk of virilization at that stage4 some features of which, e.g., voice changes are irre­versible. So bilateral orchidectomy should be done in infancy. After orchidectomy extra glandular conversion of adrenal androgens into estrogen is probably respon­sible for the satisfactory breast development5. At puberty exogenous estrogen supplementation may become necessary if satisfactory breast development does not occur6. So bilateral gonadectomy was done in this patient when she first reported. She will have a regular follow-up up till puberty. The patients with androgen insensitivity syndrome usually do not need surgical correction of external genitalia unless the adult vagina is too small for satisfac­tory coitus. Most of them can be treated with vaginal dilatation and they will end up with a functionally adequate vaginal cavity. Some may require vaginal re­placement in late adolescence. The colon can preferably he used for this operation7. Patients with the incomplete variety may have clitoral hypertrophy and require clitoral recession.

REFERENCES

1. Cabat, RE., Scullu, RE., Mark, E.J., McNeely, WY., McNeely BEt, and Eil, c. Weekly clinicopathological exercises. N. Engl.J.Med., 1990;322:917-25
2. Donohoc, P.K., Crawiord, J.D. and Ilendren, W.H. Management of neonates and children with male pseudohermaishroditism. J.Pediatr.Surg., 1977;12:1045-57.
3. Digoorge, AM. Disorders of the gonads, in Nelsons testbook of paediatrics 13th ed. Philadelphia, Saunders, 1987 Is. 1242.
4. France, N.E., Winter born, M.H. and Raiti, S. Incomplete testicular feminization. Arch.Dis.Chld., 1970;45:811 1-12
5. Andler, W. and Zachmann, M. Spontaneous breast development in an adolescent girl with testicular feminization after castration in eartychildhood. iPediatr., 1979;94:304-5.
6. Lilcourinaa, M., Conidaris, 0. Alirizatos, 0. and Dimopoulos, M.A. Complete testicular feminization syndrome in three sisters. Br.J.Urol., 1990;65:298-99.
7. Coran, AG. and Polley, T.Z. Surgical managementof ambiguous genitalia in infantand child. J.Pediatr.Surg., 1991;26:812-20.

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